$r3\:+\:729$
$39x^2-14x^2+4$
$\left(99\right)+\left(1096\right)$
$10ab-2ab+3ab-4b+5b$
$4\left(x+3\right)\ge-3\left(x+5\right)-1$
$\frac{\log a}{c}+\log b$
$\left(a+3\right)\left(2b+1\right)$
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